Car-roofing



NITED V STATES PATENT Fries.

ALBERT W. GILMOBE, OF CHICAGO, ILLINOIS.

CAR-RooFlNe.

SPECIFICATION forming part of Letters Patent No. 293,447, dated February 12, 1884. Application niea'novemter 1, issn. (No model.)

` fication.

My said improvement will be hereinafter fully described with reference to the accompanying drawings, in which-q Figure l represents a vertical transverse section of a car-roof embracing the same in its construction; Fig. 2, a plan of the same, showing some of the outside boards of the roof removed7 and a portion of the rest and the ridgeplate Gr broken away, in order to display the parts underlying them; Fig. 3, 'ap

longitudinal section of the roof, taken as in dicated by the broken line zr fr in Fig. l; and Figs. 4 and 5, detail views.

In the drawings, Bindicates the cave-plates ofthe roof-frame; B,the carlings; G,the ridgeplate, and F the purlins, all of whichmay be framed or otherwise fastened together. A are the boards ofthe side walls, which extend 4up under the outer ends of the sheet-metal plates E, and C are wooden boards fastened upon the upper ends ofthe vertical boards, and extending up, also, under the metal plates. D are eave-boards, fastened to the side walls for the out-er ends of the deck-boards L to rest upon, and are held out from the walls by a series of stop-blocks, s, so as to leave a dri-p-space, S, between them andthe boards C. The stop-blocks are each provided with grooves on the inner side for the lower edge of the lap of two adjacent plates, as shownrin Fig. l. f Ihe ridge-plate is considerably higher than the cave-plates, so as to afford a proper slope each way, and4 is provided on each side with a horizontal groove, g, for the reception of the upper ends of the metal plates E. A very important feature of my improvement are the said metal plates E, which have their upper ends insertedl in the groove g in the ridge-plate, which are merely large enough to receive the plainor uncorrugated portions, except where the corrugated portions come;

and there the grooves are provided with crossy grooves, as rshown'at e', Fig. 5, and are then bent, at the edge of the plate, by pressing their bodies downupon the purlins F, and are thus held against slipping down by the pinching action of the grooves. In order that these sheets of metal may make waterltight joints with each other, and at the same time be secured against slipping asunder laterally,under strain and twisting action when the car is in use, their side edges are bent into a regular and corresponding series of corrugations, so that the sheets can be used interchangeably, and their edges are lapped, as shown in Fig. 4, so as to have one or two corrugations on each side of the `joint. metal sheets may not be forced apart by any lateral strain-one lapping edge being raised In order that the off the other-I have provided the boards J, n

having blocks i fastened upon their under sides at such intervals that one block, i, shall beheld down upon every joint, as shown in Fig. 2. The stop-blocks s are lalso so arranged that one of them shall be abutted against by the lower end of every sheet E, which will thus be prevented from closing or even obstructing the drip-space S, which is provided for any water that may penetrate through the roof-boards L. Y

It will be observed that the sheet-metal plates break joints with each other, and are held against both vertical and lateral slipping with out the use of either nail or pin, and that their upper surfaces are provided with ample air-spaces between them and the deck-boards, and that no recesses are left upon or about them, for the lodgment of water to make rust or do them any damage. y

That I claim as new, and desire tol secure by Letters` Patent, is-

l. The ridge-plate G, provided with two horizontal grooves, f/-one in each sidesubstantially as and for the purpose described.

2. The sheet-metal covering described, held `in position above by the pinching action of rthe grooves in the ridge-plate, and below vby `the stop-*blocks s, substantially as described.

3. Ihe ridge-plate G, having side grooves, g, provided with cross-grooves e at proper intervals, corresponding to the ridges and grooves made by the corrugations of the metal sheets E, substantially .as-described.

n. w. GILMORE.

Witnesses:

B. F. CLARK, A. M. SroUr. 

